HTTP/2: limit the number of idle state switches. An attack that continuously switches HTTP/2 connection between idle and active states can result in excessive CPU usage. This is because when a connection switches to the idle state, all of its memory pool caches are freed. This change limits the maximum allowed number of idle state switches to 10 * http2_max_requests (i.e., 10000 by default). This limits possible CPU usage in one connection, and also imposes a limit on the maximum lifetime of a connection. Initially reported by Gal Goldshtein from F5 Networks.

// stub module to test header files' C++ compatibility

extern "C" {
  #include <ngx_config.h>
  #include <ngx_core.h>
  #include <ngx_event.h>
  #include <ngx_event_connect.h>
  #include <ngx_event_pipe.h>

  #include <ngx_http.h>

  #include <ngx_mail.h>
  #include <ngx_mail_pop3_module.h>
  #include <ngx_mail_imap_module.h>
  #include <ngx_mail_smtp_module.h>
}

// nginx header files should go before other, because they define 64-bit off_t
// #include <string>


void ngx_cpp_test_handler(void *data);

void
ngx_cpp_test_handler(void *data)
{
    return;
}